Probably heart burn. Get some antacids like tums
. Go see your doctor too to confirm this of course and maybe he can put you on a medicine to prevent heart burn such as prilosec
. But also recognize what foods in particular trigger an attack and avoiding them will help. For most people triggers are caffeine and fatty or acidic food. Also don't lay down for at least 2 hours after eating. Good luck. Oh and for a quick fix a glass of milk should work too.